If someone using cocaine kisses you does it get in your system?

No. Cocaine can only enter into a person's body through snorting it (inhaling it through the nose), smoking it, or injecting it. Cocaine does not enter into a person's bloodstream through close bodily contact with someone who has recently used it. Cocaine enters the bloodstream very quickly when it is inhaled; it goes directly to the brain. It also exits the body very quickly; the cocaine "high" lasts only about 20 minutes. The only way a urine sample can be positive for cocaine is if it is directly put into the body by smoking it, snorting it or injecting it.